[edwards]

Hi I have a solution of 10ng/mL of a compound of molecular mass 324g/mol. which I have calculated as 3.086x10-11 mol/ml. To get this into mol/L i multiplied this value by 1000 and ended up with 3.086x10-9mol/L. Is this correct?

I also diluted the above solution. If I do a 1:10 dilution is the concentration 3.086x10-10, a 1:100 dilution 3.086x10-11, and so on.

Would be greatful for any help you can give. 

[JGK]

Hi I have a solution of 10ng/mL of a compound of molecular mass 324g/mol. which I have calculated as 3.086x10-11 mol/ml. To get this into mol/L i multiplied this value by 1000 and ended up with 3.086x10-9mol/L. Is this correct?

No 3.086 x 10^-11 x 1000 = 3.086 x 10^-8

I also diluted the above solution. If I do a 1:10 dilution is the concentration 3.086x10-10, a 1:100 dilution 3.086x10-11, and so on.

Dilutions (x10) = 3.086 x 10^-9
Dilutions (x100) = 3.086 x 10^-10

and so on

Would be greatful for any help you can give. 

Done

[edwards]

Thanks a lot. Can't believe I can't even multiply by a 1000.